TY - JOUR
T1 - Morphology and evolution of the ejecta of Hale crater in Argyre basin, Mars
T2 - Results from high resolution mapping
AU - El-Maarry, M. R.
AU - Dohm, J. M.
AU - Michael, G.
AU - Thomas, N.
AU - Maruyama, S.
N1 - Funding Information:
M.R. El M. and N.T. are supported by funding from the Swiss National Science Foundation. J.M.D is supported by the Earth-Life Science Institute (ELSI), Tokyo Institute of Technology, on behalf of Japan, and NASA. G.M. was supported by the German Space Agency (DLR Bonn), Grant 50QM1001 (HRSC on Mars Express), on behalf of the German Federal Ministry of Economics and Technology. We thank C.W. Hamilton for useful discussions as well as providing the example of the lava flow inflation feature.
PY - 2013/9
Y1 - 2013/9
N2 - We use various data sets, including images from the High Resolution Imaging Science Experiment camera (HiRISE), to examine the ejecta of the generally fresh-looking Hale crater that occurs in the rugged mountain terrain of Nereidum Montes in the northern rim materials of the Argyre impact structure on Mars. Our investigation reveals that the distal parts of the Hale crater ejecta and other basin deposits behave like viscous flows, which we attribute to the secondary flow of ejecta mixed with water-ice-rich basin materials. Consistent with water-enrichment of the basin materials, our mapping further reveals occasionally deformed surfaces, including highly conspicuous features such as mounds and fractured plateaus that we interpret to be a result of periglacial modification, subsequent (including possibly present-day) to the transient localized melting and fluvial erosion caused by Hale-impact-generated heating. In particular, our morphometric analysis of a well-defined valley system west of Hale crater suggests that it may have been formed through hydrologic/glacial activity prior to the Hale impact, with additional modification resulting from the impact and subsequent geologic and hydrologic phenomena including glacial and periglacial activity.
AB - We use various data sets, including images from the High Resolution Imaging Science Experiment camera (HiRISE), to examine the ejecta of the generally fresh-looking Hale crater that occurs in the rugged mountain terrain of Nereidum Montes in the northern rim materials of the Argyre impact structure on Mars. Our investigation reveals that the distal parts of the Hale crater ejecta and other basin deposits behave like viscous flows, which we attribute to the secondary flow of ejecta mixed with water-ice-rich basin materials. Consistent with water-enrichment of the basin materials, our mapping further reveals occasionally deformed surfaces, including highly conspicuous features such as mounds and fractured plateaus that we interpret to be a result of periglacial modification, subsequent (including possibly present-day) to the transient localized melting and fluvial erosion caused by Hale-impact-generated heating. In particular, our morphometric analysis of a well-defined valley system west of Hale crater suggests that it may have been formed through hydrologic/glacial activity prior to the Hale impact, with additional modification resulting from the impact and subsequent geologic and hydrologic phenomena including glacial and periglacial activity.
KW - Geological processes
KW - Impact processes
KW - Mars, Surface
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U2 - 10.1016/j.icarus.2013.07.014
DO - 10.1016/j.icarus.2013.07.014
M3 - Article
AN - SCOPUS:84881224776
VL - 226
SP - 905
EP - 922
JO - Icarus
JF - Icarus
SN - 0019-1035
IS - 1
ER -